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Goodwill and Intangible Assets (Tables)
 9 Months Ended
Apr. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of aggregate amortization expense on intangible assets
The following table sets forth amortizable intangible assets by major asset class:
(In thousands)
April 30, 2016
 
July 31, 2015
Amortized intangibles:
 
 
 
Covenants not to compete
$
1,691

 
$
1,691

Supply contracts & customer relationships
27,271

 
27,506

Trade name
5,217

 
5,129

Licenses and databases
2,509

 
2,498

Accumulated amortization
(23,298
)
 
(18,967
)
Net intangibles
$
13,390

 
$
17,857
Schedule of change in carrying amount of goodwill (in thousands)
The change in the carrying amount of goodwill was as follows (in thousands):
Balance as of July 31, 2015
$
271,850

Effect of foreign currency exchange rates
(4,483
)
Balance as of April 30, 2016
$
267,367